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2 Transport aspects

Table 12-8 – FTU-O CL message NPar(2) bit definitions

ITU-T G.994.1 NPar(2) bit Definition of NPar(2) bit

Support of special probe If set to ZERO, indicates that FTU-O does not support the use of a special probe
sequence sequence during Channel Discovery 1-1 and Channel Discovery 1 stages. If set to ONE,
indicates that the FTU-O supports the use of a special probe sequence during Channel
Discovery 1-1 and Channel Discovery 1 stages (Note).

Default CE length If set to ZERO, indicates that the FTU-O is not configured to use the default CE length
LCP = m × N/64, where m = 10. If set to ONE, indicates that the FTU-O is configured to
use of the default CE length.

Default number of
If set to ZERO, indicates that the FTU-O is not configured to use the default MF value
symbol periods in TDD 36. If set to ONE, indicates that the FTU-O is configured to use the default MF value 36.
frame
NOTE – Since FTU-O is capable to support any content of probe sequence that meets the definitions in clause 10.2.2.1, support
of special probe sequence indicated in NPar(2) actually reflects the intention of the FTU-O to use special sequence rather than
its capability to generate it.

Table 12-9 – FTU-O CL message SPar(2) bit definitions

ITU-T G.994.1 SPar(2) bit Definition of Spar(2) bit
Profiles Always set to ONE.
DS transmission band Always set to ONE.
Number of downstream symbol Always set to ONE
positions in TDD frame
RFIBANDS If set to ONE, indicates that transmit PSD reduction in RFI bands is enabled. If
set to ZERO, indicates that transmit PSD reduction in RFI bands is disabled
(Note 1).
Duration of Channel Discovery 1-1 Always set to ZERO (Note 2).

CE length If set to ZERO, indicates that the FTU-O supports only the default CE length
LCP = m × N/64, where m = 10. If set to ONE, indicates that the FTU-O
supports valid CE lengths in addition to the default value, as indicated in the
corresponding CE length multiplier NPar(3) field.
Number of symbol periods in TDD If set to ZERO, indicates that the FTU-O supports only the default MF value of
frame 36. If set to ONE, indicates that the FTU-O supports other valid MF values
(mandatory or optional) in addition to the default value of 36, as indicated in
the related NPar(3).
IARBANDS If set to ONE, indicates that transmit PSD reduction in at least one of the IAR
bands is enabled. If set to ZERO, indicates that transmit PSD reduction in all
IAR bands is disabled (Note 1).
Scrambler seed Always set to ONE.
Special probe sequence Shall be set to ONE if NPar(2) is set to ONE and set to ZERO otherwise.
IDS Always set to ONE.
Number of SOC symbol repetitions Always set to ONE.
(RS)
Number of DS initialization data Always set to ONE.
symbols (sds)
Downstream RMC offset Always set to ONE.
CD time out If set to ZERO, indicates that the FTU-O supports only the default
CD_time_out_1 value of ten seconds and the default CD_time_out_2 value of

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